linux-kernel - Re: [PATCH] mm/oom: fix pgtables units mismatch in Killed process message

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Date:   Wed, 11 Dec 2019 13:44:43 -0800 (PST)
From:   David Rientjes <rientjes@...gle.com>
To:     Ilya Dryomov <idryomov@...il.com>
cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Edward Chron <echron@...sta.com>,
        Michal Hocko <mhocko@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] mm/oom: fix pgtables units mismatch in Killed process
 message

On Wed, 11 Dec 2019, Ilya Dryomov wrote:

> pr_err() expects kB, but mm_pgtables_bytes() returns the number of
> bytes.  As everything else is printed in kB, I chose to fix the value
> rather than the string.
> 
> Before:
> 
> [  pid  ]   uid  tgid total_vm      rss pgtables_bytes swapents oom_score_adj name
> ...
> [   1878]  1000  1878   217253   151144  1269760        0             0 python
> ...
> Out of memory: Killed process 1878 (python) total-vm:869012kB, anon-rss:604572kB, file-rss:4kB, shmem-rss:0kB, UID:1000 pgtables:1269760kB oom_score_adj:0
> 
> After:
> 
> [  pid  ]   uid  tgid total_vm      rss pgtables_bytes swapents oom_score_adj name
> ...
> [   1436]  1000  1436   217253   151890  1294336        0             0 python
> ...
> Out of memory: Killed process 1436 (python) total-vm:869012kB, anon-rss:607516kB, file-rss:44kB, shmem-rss:0kB, UID:1000 pgtables:1264kB oom_score_adj:0
> 
> Fixes: 70cb6d267790 ("mm/oom: add oom_score_adj and pgtables to Killed process message")
> Signed-off-by: Ilya Dryomov <idryomov@...il.com>

Acked-by: David Rientjes <rientjes@...gle.com>

I'd also suggest a

Cc: stable@...r.kernel.org # 5.4